transition-all()
  -webkit-transition all 0.5s
  -moz-transition all 0.5s
  transition all 0.5s

.transition-all
  transition-all()

background-cover()
  -webkit-background-size cover
  -moz-background-size cover
  background-size cover
  -o-background-size cover

.background-cover
  background-cover()

serif()
  font-family 'Noto Serif', 'Times New Roman', serif

.serif
  serif()

sans-serif()
  font-family 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif

.sans-serif
  sans-serif()
  
animation()
  animation bodyshow .9s linear
  
.animation
  animation()

@keyframes 'bodyshow' {
  0% {
    top: -60px;
    opacity: 0;
  }

  33% {
    top: -40px;
    opacity: .2;
  }

  66% {
    top: -20px;
    opacity: .6;
  }

  100% {
    top: 0;
    opacity: 1;
  }
}

